Software Support > GroovyMAME

vector game issues

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ahofle:
I seem to be running into some strange behavior with vector games.  When I force resolution to 640x480 (the max for my CGA monitor), I get a blank screen.  I can hear the game running fine and I can even bring up the built-in MAME menus using tab so I know the resolution is correct.  But there is no game video.  Has anyone else experienced this?  This is using groovy143.

Calamity:
So... what happens if you don't force any resolution??

ahofle:
It picks a higher resolution which my monitor doesn't support.

Calamity:

--- Quote from: ahofle on February 22, 2012, 01:20:43 pm ---It picks a higher resolution which my monitor doesn't support.

--- End quote ---

Which resolution? You mean it doesn't support it because it's actually out of sync or just because it's higher than 640x480?

I'm asking this because 640x480 is not the maximum resolution for a CGA monitor. Arcade monitors just care about frequencies, they know nothing about resolutions, and that's what GroovyMAME is checking. It's true that horizontal frequency and vertical resolution are tightly related. But just be careful because 640x480 is not necessarily safe: 640x480@75Hz is well beyond your CGA monitor capabilities.

ahofle:
I'm not sure, but I would guess it's trying 800x600i.  It's just rolling vertically whatever it is.
Is selecting 640x480 interlaced an issue?

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